I am trying to create a 3d plot of a cube and add it to my ui. after lots
of tests and following the examples I got this code to work:
# import PyQt5
# from PyQt5 import QtGui, QtCore
# import numpy as np
# import pyqtgraph as pg
# import pyqtgraph.opengl as gl
# -*- coding: utf-8 -*-
"""
Demonstrates GLVolumeItem for displaying volumetric data.
"""
## Add path to library (just for examples; you do not need this)
from pyqtgraph.Qt import QtCore, QtGui
import pyqtgraph.opengl as gl
app = QtGui.QApplication([])
w = gl.GLViewWidget()
w.opts['distance'] = 200
w.show()
w.setWindowTitle('pyqtgraph example: GLVolumeItem')
# b = gl.GLBoxItem()
# w.addItem(b)
g = gl.GLGridItem()
g.scale(10, 10, 1)
w.addItem(g)
import numpy as np
vertexes = np.array([[1, 0, 0], #0
[0, 0, 0], #1
[0, 1, 0], #2
[0, 0, 1], #3
[1, 1, 0], #4
[1, 1, 1], #5
[0, 1, 1], #6
[1, 0, 1]])#7
colors = np.array([[1,0,0,1] for i in range(12)])
faces = np.array([[1,0,7], [1,3,7],
[1,2,4], [1,0,4],
[1,2,6], [1,3,6],
[0,4,5], [0,7,5],
[2,4,5], [2,6,5],
[3,6,5], [3,7,5]])
cube = gl.GLMeshItem(vertexes=vertexes, faces=faces, faceColors=colors,
drawEdges=True, edgeColor=(0, 0, 0, 1))
w.addItem(cube)
ax = gl.GLAxisItem()
w.addItem(ax)
## Start Qt event loop unless running in interactive mode.
if __name__ == '__main__':
import sys
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
QtGui.QApplication.instance().exec_()
For some reason whenever I replace:
from pyqtgraph.Qt import QtCore, QtGui
with
from PyQt5 import QtWidgets, QtCore, QtGui
I start to get this error:
Traceback (most recent call last):
File
"/usr/local/lib/python3.7/dist-packages/pyqtgraph/opengl/GLViewWidget.py", line
188, in paintGL
self.setProjection(region=region)
File
"/usr/local/lib/python3.7/dist-packages/pyqtgraph/opengl/GLViewWidget.py", line
110, in setProjection
glMatrixMode(GL_PROJECTION)
File "/usr/lib/python3/dist-packages/OpenGL/error.py", line 232, in
glCheckError
baseOperation = baseOperation,
OpenGL.error.GLError: GLError(
err = 1282,
description = b'invalid operation',
baseOperation = glMatrixMode,
cArguments = (GL_PROJECTION,)
)
For this reason I wasn't able to get this to work in my ui. Any idea what that
might depend on?
Thanks!
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